shellback auto pump, under laundry tub

Dear sirs, could you please instruct me on how to adjust the settings on this pump.Currently it is shutting on and off continuously.We have a washing machine, and our water softener draining into this tub, I think at different times.I know there are two adjustments, a pipe with a hose connected, which slides in and out, and a threaded fitting, with a locknut, which screws in and out. Any help would be greatly appreciated. Thank you.